Math, asked by NaushadAli5733, 7 months ago

If X + y is equals to 9 x y is equals to 20 then x cube + y cube is equals to what

Answers

Answered by spiderman2019

0

Answer:

189

Step-by-step explanation:

x + y = 9

xy = 20

x³ + y³ = (x + y)³ - 3xy(x+y) ( ∵ (a + b)³ = a³ + b³ + 3ab(a + b) )

= (9)³ - 3 * 20 * 9

= 729 - 540

= 189

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